Study of "napier grass" delignification for production of cellulosic derivatives
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16
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2013
Autores
De Araujo Morandim-Giannetti A.
Albuquerque T.S.
De Carvalho R.K.C.
Araujo R.M.S.
Magnabosco R.
Albuquerque T.S.
De Carvalho R.K.C.
Araujo R.M.S.
Magnabosco R.
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Periódico
Carbohydrate Polymers
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DE ARAÚJO MORANDIM-GIANNETTI, ANDREIA; ALBUQUERQUE, TIAGO SANTOS; DE CARVALHO, RENATA KOBAL CAMPOS; ARAÚJO, RAMIRES MENEZES SILVA; Magnabosco, Rodrigo. Study of napier grass delignification for production of cellulosic derivatives. Carbohydrate Polymers, v. 92, n. 1, p. 849-855, 2013.
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Recently, much research on the evaluation of new cellulose sources has been developed. In this context, a promising source is "napier grass", which contains 30.40% lignin, 36.34% cellulose, and 34.12% hemicellulose. In this work, conditions for the delignification of "napier grass" in the laboratory were studied by using calcium oxide (CaO) and hydrogen peroxide (H2O2). The best pulping conditions were 9.00% CaO for a period of 2.73 h, which resulted in 74.99% delignification and 66.58% cellulose. The best conditions for the bleaching process were pH 12 and hydrogen peroxide at concentration of 4.2% for 6 h, at a temperature of 40 °C, which gave 90.98% delignification and 99.21% cellulose. The analyses were performed by using weight percent. © 2012 Elsevier Ltd. All rights reserved.